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Message-Id: <20241011102354.1682626-3-tiwei.btw@antgroup.com>
Date: Fri, 11 Oct 2024 18:23:54 +0800
From: "Tiwei Bie" <tiwei.btw@...group.com>
To: richard@....at,
anton.ivanov@...bridgegreys.com,
johannes@...solutions.net
Cc: <linux-um@...ts.infradead.org>,
<linux-kernel@...r.kernel.org>,
<benjamin@...solutions.net>,
"Tiwei Bie" <tiwei.btw@...group.com>,
"Benjamin Berg" <benjamin.berg@...el.com>
Subject: [PATCH v2 2/2] um: Rename _PAGE_NEWPAGE to _PAGE_NEEDSYNC
The _PAGE_NEWPAGE bit does not really indicate that this is a new page,
but rather whether this entry needs to be synced or not. Renaming it
to _PAGE_NEEDSYNC will make it more clear how everything ties together.
Suggested-by: Benjamin Berg <benjamin.berg@...el.com>
Signed-off-by: Tiwei Bie <tiwei.btw@...group.com>
---
arch/um/include/asm/page.h | 2 +-
arch/um/include/asm/pgtable-2level.h | 2 +-
arch/um/include/asm/pgtable-4level.h | 14 +++++-----
arch/um/include/asm/pgtable.h | 38 ++++++++++++++--------------
arch/um/kernel/tlb.c | 10 ++++----
5 files changed, 33 insertions(+), 33 deletions(-)
diff --git a/arch/um/include/asm/page.h b/arch/um/include/asm/page.h
index f0ad80fc8c10..99aa459c7c6c 100644
--- a/arch/um/include/asm/page.h
+++ b/arch/um/include/asm/page.h
@@ -56,7 +56,7 @@ typedef struct { unsigned long pud; } pud_t;
#define pte_set_bits(p, bits) ((p).pte |= (bits))
#define pte_clear_bits(p, bits) ((p).pte &= ~(bits))
#define pte_copy(to, from) ((to).pte = (from).pte)
-#define pte_is_zero(p) (!((p).pte & ~_PAGE_NEWPAGE))
+#define pte_is_zero(p) (!((p).pte & ~_PAGE_NEEDSYNC))
#define pte_set_val(p, phys, prot) (p).pte = (phys | pgprot_val(prot))
typedef unsigned long phys_t;
diff --git a/arch/um/include/asm/pgtable-2level.h b/arch/um/include/asm/pgtable-2level.h
index 8256ecc5b919..ab0c8dd86564 100644
--- a/arch/um/include/asm/pgtable-2level.h
+++ b/arch/um/include/asm/pgtable-2level.h
@@ -31,7 +31,7 @@
printk("%s:%d: bad pgd %p(%08lx).\n", __FILE__, __LINE__, &(e), \
pgd_val(e))
-static inline int pgd_newpage(pgd_t pgd) { return 0; }
+static inline int pgd_needsync(pgd_t pgd) { return 0; }
static inline void pgd_mkuptodate(pgd_t pgd) { }
#define set_pmd(pmdptr, pmdval) (*(pmdptr) = (pmdval))
diff --git a/arch/um/include/asm/pgtable-4level.h b/arch/um/include/asm/pgtable-4level.h
index f912fcc16b7a..0d279caee93c 100644
--- a/arch/um/include/asm/pgtable-4level.h
+++ b/arch/um/include/asm/pgtable-4level.h
@@ -55,7 +55,7 @@
printk("%s:%d: bad pgd %p(%016lx).\n", __FILE__, __LINE__, &(e), \
pgd_val(e))
-#define pud_none(x) (!(pud_val(x) & ~_PAGE_NEWPAGE))
+#define pud_none(x) (!(pud_val(x) & ~_PAGE_NEEDSYNC))
#define pud_bad(x) ((pud_val(x) & (~PAGE_MASK & ~_PAGE_USER)) != _KERNPG_TABLE)
#define pud_present(x) (pud_val(x) & _PAGE_PRESENT)
#define pud_populate(mm, pud, pmd) \
@@ -63,7 +63,7 @@
#define set_pud(pudptr, pudval) (*(pudptr) = (pudval))
-#define p4d_none(x) (!(p4d_val(x) & ~_PAGE_NEWPAGE))
+#define p4d_none(x) (!(p4d_val(x) & ~_PAGE_NEEDSYNC))
#define p4d_bad(x) ((p4d_val(x) & (~PAGE_MASK & ~_PAGE_USER)) != _KERNPG_TABLE)
#define p4d_present(x) (p4d_val(x) & _PAGE_PRESENT)
#define p4d_populate(mm, p4d, pud) \
@@ -72,23 +72,23 @@
#define set_p4d(p4dptr, p4dval) (*(p4dptr) = (p4dval))
-static inline int pgd_newpage(pgd_t pgd)
+static inline int pgd_needsync(pgd_t pgd)
{
- return(pgd_val(pgd) & _PAGE_NEWPAGE);
+ return pgd_val(pgd) & _PAGE_NEEDSYNC;
}
-static inline void pgd_mkuptodate(pgd_t pgd) { pgd_val(pgd) &= ~_PAGE_NEWPAGE; }
+static inline void pgd_mkuptodate(pgd_t pgd) { pgd_val(pgd) &= ~_PAGE_NEEDSYNC; }
#define set_pmd(pmdptr, pmdval) (*(pmdptr) = (pmdval))
static inline void pud_clear (pud_t *pud)
{
- set_pud(pud, __pud(_PAGE_NEWPAGE));
+ set_pud(pud, __pud(_PAGE_NEEDSYNC));
}
static inline void p4d_clear (p4d_t *p4d)
{
- set_p4d(p4d, __p4d(_PAGE_NEWPAGE));
+ set_p4d(p4d, __p4d(_PAGE_NEEDSYNC));
}
#define pud_page(pud) phys_to_page(pud_val(pud) & PAGE_MASK)
diff --git a/arch/um/include/asm/pgtable.h b/arch/um/include/asm/pgtable.h
index 6b1317400190..12bfc58a8580 100644
--- a/arch/um/include/asm/pgtable.h
+++ b/arch/um/include/asm/pgtable.h
@@ -11,7 +11,7 @@
#include <asm/fixmap.h>
#define _PAGE_PRESENT 0x001
-#define _PAGE_NEWPAGE 0x002
+#define _PAGE_NEEDSYNC 0x002
#define _PAGE_RW 0x020
#define _PAGE_USER 0x040
#define _PAGE_ACCESSED 0x080
@@ -79,22 +79,22 @@ extern unsigned long end_iomem;
*/
#define ZERO_PAGE(vaddr) virt_to_page(empty_zero_page)
-#define pte_clear(mm,addr,xp) pte_set_val(*(xp), (phys_t) 0, __pgprot(_PAGE_NEWPAGE))
+#define pte_clear(mm, addr, xp) pte_set_val(*(xp), (phys_t) 0, __pgprot(_PAGE_NEEDSYNC))
-#define pmd_none(x) (!((unsigned long)pmd_val(x) & ~_PAGE_NEWPAGE))
+#define pmd_none(x) (!((unsigned long)pmd_val(x) & ~_PAGE_NEEDSYNC))
#define pmd_bad(x) ((pmd_val(x) & (~PAGE_MASK & ~_PAGE_USER)) != _KERNPG_TABLE)
#define pmd_present(x) (pmd_val(x) & _PAGE_PRESENT)
-#define pmd_clear(xp) do { pmd_val(*(xp)) = _PAGE_NEWPAGE; } while (0)
+#define pmd_clear(xp) do { pmd_val(*(xp)) = _PAGE_NEEDSYNC; } while (0)
-#define pmd_newpage(x) (pmd_val(x) & _PAGE_NEWPAGE)
-#define pmd_mkuptodate(x) (pmd_val(x) &= ~_PAGE_NEWPAGE)
+#define pmd_needsync(x) (pmd_val(x) & _PAGE_NEEDSYNC)
+#define pmd_mkuptodate(x) (pmd_val(x) &= ~_PAGE_NEEDSYNC)
-#define pud_newpage(x) (pud_val(x) & _PAGE_NEWPAGE)
-#define pud_mkuptodate(x) (pud_val(x) &= ~_PAGE_NEWPAGE)
+#define pud_needsync(x) (pud_val(x) & _PAGE_NEEDSYNC)
+#define pud_mkuptodate(x) (pud_val(x) &= ~_PAGE_NEEDSYNC)
-#define p4d_newpage(x) (p4d_val(x) & _PAGE_NEWPAGE)
-#define p4d_mkuptodate(x) (p4d_val(x) &= ~_PAGE_NEWPAGE)
+#define p4d_needsync(x) (p4d_val(x) & _PAGE_NEEDSYNC)
+#define p4d_mkuptodate(x) (p4d_val(x) &= ~_PAGE_NEEDSYNC)
#define pmd_pfn(pmd) (pmd_val(pmd) >> PAGE_SHIFT)
#define pmd_page(pmd) phys_to_page(pmd_val(pmd) & PAGE_MASK)
@@ -145,9 +145,9 @@ static inline int pte_young(pte_t pte)
return pte_get_bits(pte, _PAGE_ACCESSED);
}
-static inline int pte_newpage(pte_t pte)
+static inline int pte_needsync(pte_t pte)
{
- return pte_get_bits(pte, _PAGE_NEWPAGE);
+ return pte_get_bits(pte, _PAGE_NEEDSYNC);
}
/*
@@ -200,13 +200,13 @@ static inline pte_t pte_mkwrite_novma(pte_t pte)
static inline pte_t pte_mkuptodate(pte_t pte)
{
- pte_clear_bits(pte, _PAGE_NEWPAGE);
+ pte_clear_bits(pte, _PAGE_NEEDSYNC);
return pte;
}
-static inline pte_t pte_mknewpage(pte_t pte)
+static inline pte_t pte_mkneedsync(pte_t pte)
{
- pte_set_bits(pte, _PAGE_NEWPAGE);
+ pte_set_bits(pte, _PAGE_NEEDSYNC);
return(pte);
}
@@ -214,11 +214,11 @@ static inline void set_pte(pte_t *pteptr, pte_t pteval)
{
pte_copy(*pteptr, pteval);
- /* If it's a swap entry, it needs to be marked _PAGE_NEWPAGE so
+ /* If it's a swap entry, it needs to be marked _PAGE_NEEDSYNC so
* update_pte_range knows to unmap it.
*/
- *pteptr = pte_mknewpage(*pteptr);
+ *pteptr = pte_mkneedsync(*pteptr);
}
#define PFN_PTE_SHIFT PAGE_SHIFT
@@ -258,7 +258,7 @@ static inline void set_ptes(struct mm_struct *mm, unsigned long addr,
#define __HAVE_ARCH_PTE_SAME
static inline int pte_same(pte_t pte_a, pte_t pte_b)
{
- return !((pte_val(pte_a) ^ pte_val(pte_b)) & ~_PAGE_NEWPAGE);
+ return !((pte_val(pte_a) ^ pte_val(pte_b)) & ~_PAGE_NEEDSYNC);
}
/*
@@ -308,7 +308,7 @@ extern pte_t *virt_to_pte(struct mm_struct *mm, unsigned long addr);
* <--------------- offset ----------------> E < type -> 0 0 0 1 0
*
* E is the exclusive marker that is not stored in swap entries.
- * _PAGE_NEWPAGE (bit 1) is always set to 1 in set_pte().
+ * _PAGE_NEEDSYNC (bit 1) is always set to 1 in set_pte().
*/
#define __swp_type(x) (((x).val >> 5) & 0x1f)
#define __swp_offset(x) ((x).val >> 11)
diff --git a/arch/um/kernel/tlb.c b/arch/um/kernel/tlb.c
index 23c1f550cd7c..cf7e0d4407f2 100644
--- a/arch/um/kernel/tlb.c
+++ b/arch/um/kernel/tlb.c
@@ -57,7 +57,7 @@ static inline int update_pte_range(pmd_t *pmd, unsigned long addr,
pte = pte_offset_kernel(pmd, addr);
do {
- if (!pte_newpage(*pte))
+ if (!pte_needsync(*pte))
continue;
if (pte_present(*pte)) {
@@ -101,7 +101,7 @@ static inline int update_pmd_range(pud_t *pud, unsigned long addr,
do {
next = pmd_addr_end(addr, end);
if (!pmd_present(*pmd)) {
- if (pmd_newpage(*pmd)) {
+ if (pmd_needsync(*pmd)) {
ret = ops->unmap(ops->mm_idp, addr,
next - addr);
pmd_mkuptodate(*pmd);
@@ -124,7 +124,7 @@ static inline int update_pud_range(p4d_t *p4d, unsigned long addr,
do {
next = pud_addr_end(addr, end);
if (!pud_present(*pud)) {
- if (pud_newpage(*pud)) {
+ if (pud_needsync(*pud)) {
ret = ops->unmap(ops->mm_idp, addr,
next - addr);
pud_mkuptodate(*pud);
@@ -147,7 +147,7 @@ static inline int update_p4d_range(pgd_t *pgd, unsigned long addr,
do {
next = p4d_addr_end(addr, end);
if (!p4d_present(*p4d)) {
- if (p4d_newpage(*p4d)) {
+ if (p4d_needsync(*p4d)) {
ret = ops->unmap(ops->mm_idp, addr,
next - addr);
p4d_mkuptodate(*p4d);
@@ -181,7 +181,7 @@ int um_tlb_sync(struct mm_struct *mm)
do {
next = pgd_addr_end(addr, mm->context.sync_tlb_range_to);
if (!pgd_present(*pgd)) {
- if (pgd_newpage(*pgd)) {
+ if (pgd_needsync(*pgd)) {
ret = ops.unmap(ops.mm_idp, addr,
next - addr);
pgd_mkuptodate(*pgd);
--
2.34.1
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